Closed
Description
The following program causes rustc to crash:
extern crate libc;
use std::c_vec::CVec;
fn void_buf() -> libc::c_void {
unsafe {
std::mem::transmute(b'0')
}
}
fn main() {
unsafe{
CVec::new(void_buf() as *mut f32,0);
}
}Obviously it's badly typed (converting void to a pointer type), but the compiler shouldn't crash here right? :)
output of rustc -v: rustc 0.12.0-pre-nightly (09abbbd 2014-09-11 00:05:41 +0000)
backtrace from trying to compile;
error: internal compiler error: translating unsupported cast: libc::types::common::c95::c_void (cast_enum) -> *mut f32 (cast_pointer)
note: the compiler hit an unexpected failure path. this is a bug.
note: we would appreciate a bug report: http://doc.rust-lang.org/complement-bugreport.html
note: run with `RUST_BACKTRACE=1` for a backtrace
task 'rustc' failed at 'Box<Any>', /home/rustbuild/src/rust-buildbot/slave/nightly-linux/build/src/libsyntax/ast_util.rs:776
stack backtrace:
1: 0x7f30f3711880 - rt::backtrace::imp::write::h6280ef424d93578eYFq
2: 0x7f30f3714a80 - failure::on_fail::hd9f0344ab848748bq1q
3: 0x7f30f7c7bdf0 - unwind::begin_unwind_inner::h1fb7b215753db772MTd
4: 0x7f30f6223120 - unwind::begin_unwind::h1902930648154155005
5: 0x7f30f62238c0 - diagnostic::Handler::bug::h5fa2fdf0a394a866YID
6: 0x7f30f82d7dd0 - driver::session::Session::bug::h31584d237f0b1c7aHnv
7: 0x7f30f8725570 - middle::trans::expr::trans_imm_cast::hfcbb834eeb12c5d6QZ2
8: 0x7f30f8718590 - middle::trans::expr::trans_unadjusted::h0ddf38fb0dd9ac54Q60
9: 0x7f30f86d7550 - middle::trans::expr::trans::hf17957ab9b3c28232o0
10: 0x7f30f87114b0 - middle::trans::callee::trans_args::h0af8fd993cc8dfechUZ
11: 0x7f30f86df600 - middle::trans::callee::trans_call_inner::hb705da9b2ec56867izZ
12: 0x7f30f870b070 - middle::trans::callee::trans_call::h82b56b8467ae33aeBtZ
13: 0x7f30f8719640 - middle::trans::expr::trans_rvalue_dps_unadjusted::hd2382dd726436e17OG1
14: 0x7f30f8718590 - middle::trans::expr::trans_unadjusted::h0ddf38fb0dd9ac54Q60
15: 0x7f30f86d7550 - middle::trans::expr::trans::hf17957ab9b3c28232o0
16: 0x7f30f86d52e0 - middle::trans::controlflow::trans_stmt_semi::h5d141746b25726bbinW
17: 0x7f30f86d4970 - middle::trans::controlflow::trans_stmt::h6a70859a372a5e27fjW
18: 0x7f30f86d6340 - middle::trans::controlflow::trans_block::h2335b3c4eec688f0boW
19: 0x7f30f8719640 - middle::trans::expr::trans_rvalue_dps_unadjusted::hd2382dd726436e17OG1
20: 0x7f30f86d5ea0 - middle::trans::expr::trans_into::h9d43d42a11539cf0il0
21: 0x7f30f86d6340 - middle::trans::controlflow::trans_block::h2335b3c4eec688f0boW
22: 0x7f30f8784fb0 - middle::trans::base::trans_closure::hf32195399c54cea9Tqc
23: 0x7f30f86c6250 - middle::trans::base::trans_fn::h5d400738a2233bcc6Bc
24: 0x7f30f86c1830 - middle::trans::base::trans_item::h2b7563fbd8aacff6fVc
25: 0x7f30f8791930 - middle::trans::base::trans_crate::hd8f395f79f2d91279Sd
26: 0x7f30f8be70d0 - driver::driver::phase_4_translate_to_llvm::hc53882c1ebc8022a8Ou
27: 0x7f30f8bde3b0 - driver::driver::compile_input::h0ec09ff4cede62cdxqu
28: 0x7f30f8c73020 - driver::run_compiler::h90a2945ca74d50e07ay
29: 0x7f30f8c72f10 - driver::main_args::closure.148408
30: 0x7f30f8306ac0 - task::TaskBuilder<S>::try_future::closure.100323
31: 0x7f30f83068b0 - task::TaskBuilder<S>::spawn_internal::closure.100294
32: 0x7f30f7fcfda0 - task::spawn_opts::closure.8416
33: 0x7f30f7cd4380 - rust_try_inner
34: 0x7f30f7cd4370 - rust_try
35: 0x7f30f7c79380 - unwind::try::h69140ac3a4141faauId
36: 0x7f30f7c791e0 - task::Task::run::h449c8493a0d61f09fYc
37: 0x7f30f7fcfb10 - task::spawn_opts::closure.8356
38: 0x7f30f7c7ae20 - thread::thread_start::h71dd1e21d4d03408rid
39: 0x7f30f2ab3250 - start_thread
40: 0x7f30f79543b9 - clone
41: 0x0 - <unknown>
Let me know if you need more information.